天主教徒阿拉贡的费尔南多二世（Ferrando II de Aragón el Católico；1452年3月10日－1516年1月23日）阿拉贡国王（1479年－1516年在位），卡斯蒂利亚国王（1474年－1504年在位，称费尔南多五世）。他也是西西里国王（1468年起，称费迪南多二世）和那不勒斯国王（1504年起，称费迪南多三世）。通过与卡斯蒂利亚女王伊莎贝拉一世的婚姻，斐迪南二世实际上是统一的西班牙的第一个国王。

Ferdinand II (10 March 1452 – 23 January 1516), called the Catholic, was King of Sicily from 1468 and King of Aragon from 1479 until his death. As a consequence of his marriage to Isabella I, he was King of Castile jure uxoris as Ferdinand V from 1474 until her death in 1504. He was recognised as regent of Castile for his daughter and heir, Joanna, from 1508 until his own death. In 1504, after a war with France, he became King of Naples as Ferdinand III, reuniting Naples with Sicily permanently and for the first time since 1458. In 1512, he became King of Navarre by conquest.